Don't you go forgetting that Valve Presents: The Sacrifice And Other Steam-Powered Stories goes on sale later this month.

The book collects Left 4 Dead: the Sacrifice, Team Fortress 2: War!, Mac, Loose Canon, Bidwell's Big Plan, Meet the Director and associated materials; and Portal: Lab Rat into one easy to grasp collection with a forward by Australia's own Saxton Hale.

The 208-page hardcover book will run you $25 and, according to Hale at least, it's meant for children and simpletons.